package com.atguigu.web;

import com.atguigu.pojo.Book;
import com.atguigu.pojo.Page;
import com.atguigu.service.BookService;
import com.atguigu.service.impl.BookServiceImpl;
import com.atguigu.utils.WebUtils;
import jdk.nashorn.internal.ir.annotations.Ignore;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @ClassName ClientBookServlet
 * @Description TODO
 * @Author lmy
 * @Date 2022/4/1 07:53
 **/
public class ClientBookServlet extends BaseServlet{
    private BookService bookService=new BookServiceImpl();
    //处理分页功能
    protected void page(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //1.获取请求的参数pageNo和pageSize
        int pageNo= WebUtils.parseInt(req.getParameter("pageNo"),1);
        int pageSize=WebUtils.parseInt(req.getParameter("pageSize"), Page.page_size);
        //2.调用BookService.page(pageNo,pageSize): Page对象
        Page<Book> page=bookService.page(pageNo,pageSize);
        page.setUrl("client/bookServlet?action=page");
        //3.保存Page对象到Request域中
        req.setAttribute("page",page);
        //4.请求转发到pages/manager/book_manager.jsp页面
        req.getRequestDispatcher("/pages/client/index.jsp").forward(req,resp);
    }
    protected void pageByPrice(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //1.获取请求的参数pageNo和pageSize
        int pageNo= WebUtils.parseInt(req.getParameter("pageNo"),1);
        int pageSize=WebUtils.parseInt(req.getParameter("pageSize"), Page.page_size);
        int min=WebUtils.parseInt(req.getParameter("min"),0);
        int max=WebUtils.parseInt(req.getParameter("max"),Integer.MAX_VALUE);
        //2.调用BookService.page(pageNo,pageSize): Page对象
        Page<Book> page=bookService.pageByPrice(pageNo,pageSize,min,max);
        StringBuilder sb=new StringBuilder("client/bookServlet?action=pageByPrice");
        //如果有最小价格的参数,追加到分页条的地址参数中
        if (req.getParameter("min")!=null)
        {
            sb.append("&min=").append(req.getParameter("min"));
        }
        //如果有最大价格的参数,追加到分页条的地址参数中
        if (req.getParameter("max")!=null)
        {
            sb.append("&max=").append(req.getParameter("max"));
        }
        page.setUrl(sb.toString());
        //3.保存Page对象到Request域中
        req.setAttribute("page",page);
        //4.请求转发到pages/manager/book_manager.jsp页面
        req.getRequestDispatcher("/pages/client/index.jsp").forward(req,resp);
    }
}
